The Pearl Shine(TM) Vibrator Series consists of glossy rubber outer skin over a foam core. The multi-speed 7 Blue has a soft sensual feel and silky sensation with diameters up to 1.625. It features realistic veins along the shaft, one ring of 16 stimulators, and horizontal ribs thereafter. Two AA batteries, not included, provide the vibrating action. It's waterproof for all of your water sport fun!